Car immobilizer

'What is a Car Immobilizer?'

Car immobilizers are relatively new types of car theft deterrents. The basic idea is the device immobilizes the car's engine, transmission, fuel supply, or some other critical moving part. This keeps a feature from being able to move or start the car. Car immobilizers range in sophistication and can cost from between $100 to around $600. This usually includes the purchase price and installation. Using security transponders, car immobilizer systems provide a very effective means for theft protection. With challenge-response or mutual-authentication techniques, remote keyless entry can be added easily to immobilizer systems, providing increased customer convenience during use of the vehicle.

'Background information'

Pressing a button on the key to unlock the car from a couple of meters away is a standard feature on many cars today. In the past, the immobilizer function providing authorization to start the engine, worked independently from the remote access operation of the car door. NXP Semiconductors has introduced the first transponder to incorporate both functions in a single chip.

There are many companies which provide these devices, just for example and to understand its fetures and working we can take a example of- The UF0-480 GSM Mobile Car alarm system, it Use the latest GSM mobile telephone communication technology

It allows you to activate and de-activate by your mobile or by you existing car alarm. Alerts you by SMS text message of a problem or by call to your phone within seconds! The system allows you to listen in to your car at any time. In-car microphone and speaker system allows you to communicate with normal driver or with intruder! Works as a basic alarm or interfaces with cars own alarm. Switch the engine off and immobilse remotely by SMS text message.

'Features'

Easy installation

Installation is extremely easy. The product generally requires a constant 12v supply from your car battery. Speaker and microphone simply plug in via standard connection plugs. we can refer to full user manual for a simple wiring diagram.

Auto-dial technology

Once programmed with your selected home or mobile phone numbers the system will alert you automatically in the event of an emergency. The unit contains a mobile phone transmitter system which allows you to communicate with the occupants of your vehicle. Calls up to 3 numbers can be called in the event of a problem.

24 hour / 365 days a year protection at the press of a button

Setting or deactivating the alarm could not be easier. Simply press your wireless key fob just like the device shown in the photograph. You may also use your mobile phone to activate / deactivate your alarm system.

Communicate with your car at any time— an ideal supplement to your existing security system

If your car benefits a factory installed or add-on security system interfacing is extremely easy. Simply power the unit and connect the 12v trigger wire to an output or siren connection. You will then be able to communicate with the car and have the ability to cut out the engine when the vehicle has stopped.

'SIM card of your choice.'

The companies usually provide the user a sim card of his /her choice whose service is available to the users location and generally the company gives the SIM free

'Main Features'

• Insert the GSM SIM card provided into the unit and programming is simple.

• Easy operation. The system is activated by remote control key fob or by telephone / mobile phone.

• Programme up to 3 telephone numbers (mobile or landline) to receive alert calls & messages.

• Operates as a basic alarm system or interfaces with cars existing security system.

• Allows you to communicate with cars occupants at any time via microphone and speakers within car.

• System can be operated by telephone from anywhere in the world, allowing activation and deactivation.

• Engine cut off can be operated via telephone line when the vehicle has stopped.

References

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Further Reading

For further related information on Immobilisers please refer to Wikipedia Immobiliser